How should I model this geometry?

Hi guys, I was wondering in rhino/grasshopper how should I model this geometry? Minimum surface/kangaroo?

I was using Marvelous designer to make this geometry. Should be the same concept behind

I think that top one is form from revolved arcs:

There isn’t a minimal surface with those 2 edges as boundary - it just collapses to a strand.

1 Like

Making Dan’s solution above but in Subd will make it easier to get smooth forms with out having to fight your continuities


You can also do the same thing with 6 arcs instead of 4 and get a shape that rolls in a funny way:

Thanks Dan! Revolve is the right solution for this case. But I was thinking more genral case like a membrane stretched around any kind of frame(like the example showed below in which the rings are covered by stretched membrane). how to simulate the stretched surface in rhino/grasshopper ?